Adapter



FIG. 1 is a top perspective view of an adapter;

FIG. 2 is a front view of the adapter;

FIG. 3 is a right side view of the adapter;

FIG. 4 is a top view of the adapter;

FIG. 5 is a bottom view of the adapter; and,

FIG. 6 is a bottom perspective view of the adapter. 

CLAIM The ornamental design for an adapter, as shown and described. 